WESTFORD, Mass., July 17, 2014–NetScout Systems, Inc. (NASDAQ: NTCT), an industry leader for advanced network, application and service assurance solutions, today announced financial results for its first quarter of fiscal year 2015 ended June 30, 2014.

“Continuing our revenue growth performance of the past two fiscal years, NetScout delivered a strong beginning to our 2015 fiscal year,” said Anil Singhal, President and CEO of NetScout Systems. “We are executing well on our strategy, and our results reflect market acceptance of our solutions and value proposition. We are demonstrating that we can set and achieve ambitious operating goals and we are excited about our market positioning and growth prospects. This quarter, we saw very strong demand from our Service Provider customers as they are focusing on their 4G/LTE network rollouts and new LTE enabled services. Our new nGeniusONE platform is gaining mind share with key customers from varied industries as they realize the value of integrated network and application performance management functionality. We are pleased to reiterate our full year 2015 guidance with a revenue growth range of 13%-17% and an EPS growth range of 14%-18%,” added Anil Singhal.

Total GAAP and non-GAAP revenue for the first quarter was $107.9 million. A reconciliation of GAAP and non-GAAP results is included in the attached financial tables.

Product revenue for the first quarter, on a GAAP and non-GAAP basis was $64.4 million. Service revenue on a GAAP and non-GAAP basis was $43.5 million. GAAP net income for the first quarter was $11.5 million, or $0.27 per diluted share. GAAP income from operations was $19.6 million. On a non-GAAP basis, net income for the quarter was $15.2 million, or $0.36 per diluted share, and non-GAAP income from operations was $25.3 million.

GAAP operating margin was 18%, up seven points from a year ago and down five points sequentially. Non-GAAP operating margin was 23%, up six points from a year ago and down five points sequentially.

As of June 30, 2014, cash and cash equivalents and short and long-term marketable securities were $234.4 million, up $15.6 million from $218.8 million as of the end of the prior quarter.

Guidance:

For fiscal year 2015, we are reiterating the guidance we issued last quarter. We expect GAAP and non-GAAP revenue to be in the range of $450 million to $465 million. GAAP net income per diluted share is expected to be in the range of $1.36 to $1.43 and non-GAAP net income per diluted share to be in the range of $1.74 and $1.81.

For fiscal year 2015, the non-GAAP net income per diluted share expectation excludes forecasted share-based compensation expenses of approximately $16.3 million, estimated amortization of acquired intangible assets of approximately $7.1 million, compensation for post combination services of approximately $1.2 million, and the related impact of these adjustments on the provision for income taxes of $8.5 million.

CONFERENCE CALL INSTRUCTIONS:

NetScout invites shareholders to listen to its conference call today at 8:30 a.m. ET, which will be webcast live through NetScout’s website at http://ir.netscout.com/phoenix.zhtml?c=92658&p=irol-irhome. Alternatively, people can listen to the call by dialing (866) 701-8242 for U.S./Canada and (763) 416-6912 for international callers and using conference ID: 71521617. A replay of the call will be available after 11:30 a.m. ET on July 17, 2014 for approximately one week. The number for the replay is (855) 859-2056 for U.S./Canada and (404) 537-3406 for international callers. The conference ID is: 71521617.

Use of Non-GAAP Financial Information

To supplement the financial measures presented in NetScout's press release in accordance with accounting principles generally accepted in the United States ("GAAP"), NetScout also reports the following non-GAAP measures: non-GAAP total revenue, non-GAAP product revenue, non-GAAP service revenue, non-GAAP net income, non-GAAP net income per diluted share and non-GAAP product margin. Non-GAAP revenue eliminates the GAAP effects of acquisitions by adding back revenue related to deferred revenue revaluation. Non-GAAP net income includes the foregoing adjustment and also removes inventory fair value adjustments, expenses related to the amortization of acquired intangible assets, stock-based compensation, restructuring, certain expenses relating to acquisitions including compensation for post-combination services and business development charges, net of related income tax effects. Non-GAAP diluted net income per share also excludes these expenses as well as the related impact of all these adjustments on the provision for income taxes.

These non-GAAP measures are not in accordance with GAAP, should not be considered an alternative for measures prepared in accordance with GAAP (revenue, net income and diluted net income per share), and may have limitations in that they do not reflect all of NetScout’s results of operations as determined in accordance with GAAP. These non-GAAP measures should only be used to evaluate NetScout’s results of operations in conjunction with the corresponding GAAP measures. The presentation of non-GAAP information is not meant to be considered superior to, in isolation from or as a substitute for results prepared in accordance with GAAP. NetScout believes these non-GAAP financial measures will enhance the reader’s overall understanding of NetScout’s current financial performance and NetScout's prospects for the future by providing a higher degree of transparency for certain financial measures and providing a level of disclosure that helps investors understand how the Company plans and measures its own business.

NetScout believes that providing these non-GAAP measures affords investors a view of NetScout’s operating results that may be more easily compared to peer companies and also enables investors to consider NetScout’s operating results on both a GAAP and non-GAAP basis during and following the integration period of NetScout’s acquisitions. Presenting the GAAP measures on their own would not be indicative of NetScout’s core operating results. Furthermore, NetScout believes that the presentation of non-GAAP measures when shown in conjunction with the corresponding GAAP measures provide useful information to management and investors regarding present and future business trends relating to its financial condition and results of operations.

NetScout management regularly uses supplemental non-GAAP financial measures internally to understand, manage and evaluate its business and to make operating decisions. These non-GAAP measures are among the primary factors that management uses in planning and forecasting

About NetScout Systems, Inc.

NetScout Systems, Inc. (NASDAQ:NTCT) is the market leader in application and network performance management solutions that enable enterprise and service provider organizations to assure the quality of the user experience for business and mobile services. Used by 92 percent of Fortune 100 organizations and more than 165 service providers worldwide, NetScout’s technology helps these organizations proactively manage service delivery and identify emerging performance problems, helping to quickly resolve issues that cause business disruptions or negatively impact users of information technology. For more information about NetScout, visit www.netscout.com.

Safe Harbor

Forward-looking statements in this release are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934, as amended, and other federal securities laws. Investors are cautioned that statements in this press release, which are not strictly historical statements, including without limitation, our financial guidance for fiscal 2015, constitute forward-looking statements which involve risks and uncertainties. Actual results could differ materially from the forward-looking statements. Risks and uncertainties which could cause actual results to differ include, without limitation, risks and uncertainties associated with slowdowns or downturns in economic conditions generally and in the market for advanced network and service assurance solutions specifically, NetScout’s relationships with strategic partners, dependence upon broad-based acceptance of NetScout’s network performance management solutions, NetScout’s ability to achieve and maintain a high rate of growth, introduction and market acceptance of new products and product enhancements, the ability of NetScout to take advantage of service provider opportunities, competitive pricing pressures, reliance on sole source suppliers, successful expansion and management of direct and indirect distribution channels and dependence on proprietary technology and the ability of NetScout to successfully integrate Accanto Systems and ONPATH Technologies, and achieve operational efficiencies. For a more detailed description of the risk factors associated with NetScout, please refer to NetScout’s Annual Report on Form 10-K for the fiscal year ended March 31, 2014 on file with the Securities and Exchange Commission. NetScout assumes no obligation to update any forward-looking information contained in this press release or with respect to the announcements described herein.